How to Read an Business Object using Bol Programming

[brkcnplt]

 lr_order = lr_factory->create( lt_params )
Inside the lr_order , I can see the guid which is created (in ref_data). How can I move it also to an variable.

I did create as business object , and I want to read that object , Which method or class should I use ? And ıs there anyone who can explain me the purpose of this classes

cl_crm_bol_core
cl_crm_bol_entity_factory
cl_crm_bol_entity
if_bol_transaction_context

I have just start to study bol programming , but there is so much thing Im really confused.

[FredericGirod]

I am not sure to understand what exactly you expect

if_bol_transaction_context

it is an interface (you could check in SE24); that means it is the contract between the class & outside. You have to use it. like that

data o_trans_context type ref to if_bol_transaction_context.
o_trans_context = new the_real_class( ).

When you will use it, you will be able to access only to the method defined in the Interface, not the additionnal method in the class.

cl_crm_bol_entity_factory

Should be a factory, it is a Design Pattern. The purpose of this class is to create an instance of the correct final class. That means instead of

o_class_instance = new the_class( ).

you have to use

o_class_instance = new cl_crm_bol_entity_factory( )->create( ... ).

the better with all these, is to find an example if you are a junior in Object programming & Design pattern

[Sandra_Rossi]

There are a lot of blog posts, questions and answers, about BOL, in this forum. Please read them and you'll get answers to the most simple questions.